Residential delivery area · Colorado
ZIP Code 80504: Longmont, CO
ZIP code 80504 uses the postal name Longmont, Colorado and lies mostly in Weld County (59% of its land) with the rest in Boulder County (Census 2020 ZIP-county file). About 63,000 people live there (Census Bureau, ACS 2020-2024), the most populous of Longmont's 3 residential ZIP codes. Median household income is $113,643 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Firestone (13%), Longmont (11%) and Frederick (7%), and 4% in smaller places; 66% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Longmont · 3 residential ZIPs
- County
- Weld County (59%); Boulder County (41%)
- Census places
- Firestone (13%); Longmont (11%); Frederick (7%)
- Metro area
- Greeley, CO
- House districts
- CO-2 (59%), CO-8 (41%) 119th Congress, by share of land
- State
- Colorado
- Time zone
- Mountain
- Land area
- 94.6 sq mi · 671 people per sq mi
- PO Box ZIPs
- 80502 also use the name Longmont
Where is ZIP code 80504?
80504 centers on 40.166°, -105.029° and covers 94.6 square miles of land plus 5.1 of water. It borders 11 ZIP codes: 80501, 80542, 80520, 80530, 80514, 80516, 80503, 80513, 80026, 80621 and more.
The map draws ZIP code areas only. For the streets inside 80504, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 80504 compare with the rest of Longmont?
| Measure | 80504 | In Longmont | In Weld County | In CO |
|---|---|---|---|---|
| People (ACS 2020-2024) | 63,451 | 1st of 3 | 2nd of 42 | 6th of 527 |
| Median household income | $114k | 1st of 3 | 8th of 25 | 70th of 277 |
| Median home value | $592k | 2nd of 3 | 5th of 29 | 109th of 311 |
Its median household income is higher than in 88% of U.S. residential ZIP codes, and it is denser than 75% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 80504?
The 2020 Census counted 60,183 people in 80504; the ACS, which samples households over 2020-2024, estimates 63,451. Between the 2010 and 2020 censuses its population grew 28.4% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 63,451
- 2020 Census count
- 60,183+28.4% since 2010 (46,876)
- Households
- 24,077
- Median age
- 39.5
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 80504?
Of the 63,451 people the ACS estimates in 80504, 21.3% are under 18 and 16.1% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (67.1%), then Hispanic or Latino (24.1%).
- Under 1821.3%
- 18 to 6462.6%
- 65 and older16.1%
- White, not Hispanic67.1%
- Hispanic or Latino24.1%
- Other or two or more5.4%
- Asian, not Hispanic2.8%
- Black, not Hispanic0.7%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 80504 earn?
Median household income is $113,643 (ACS 2020-2024), the 8th highest of the 25 ranked ZIP codes in Weld County. It is not measurably different from 2015-2019 ($117,114 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $113,643
- Income per person
- $52,586
- Below the poverty line
- 5.0%
- Unemployed (of the labor force)
- 3.8%
- Adults 25+ with a bachelor's degree
- 44.7%
- Adjusted gross income per tax return, 2022
- $102,20631,180 returns; wages 69% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 80504?
FHFA's house price index for 80504, built from repeat sales and appraisals of the same homes, rose 94% from 2015 to 2025 and rose 38% from 2020 to 2025, and moved −1.7% in 2025.
- Median home value (owners' estimate)
- $591,700
- Median gross rent
- $1,996
- Homes owned by their occupants
- 79.1%
- Housing units
- 24,615
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 80504?
1,192 business establishments had a location in this ZIP code in 2023, 212 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction209
- Professional, scientific, and technical services184
- Administrative and support and waste management and remediation services95
- Other services (except public administration)93
- Retail trade90
- Manufacturing86
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 80504?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 80501 | Longmont | 44,147 | $81k | 3.8 mi |
| 80542 | Mead | 5,155 | $134k | 5.0 mi |
| 80520 | Firestone | 1,140 | $64k | 6.2 mi |
| 80530 | Frederick | 6,242 | $124k | 7.1 mi |
| 80514 | Dacono | 6,721 | $105k | 7.6 mi |
| 80516 | Erie | 39,048 | $169k | 7.8 mi |
| 80503 | Longmont | 35,846 | $114k | 9.6 mi |
| 80513 | Berthoud | 18,271 | $127k | 10.4 mi |
| 80026 | Lafayette | 32,701 | $120k | 11.2 mi |
| 80621 | Fort Lupton | 15,060 | $90k | 12.7 mi |
| 80651 | Platteville | 4,837 | $82k | 12.7 mi |
| 80544 | Niwot | 0 | – | 8.7 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.